2H+ (aq) + Sn(s) → H₂ (9) + Sn²+ (aq)2H+ (aq) + 2e → H2 (9) Ere= 0.000 VSn2+(aq) + 2e → Sn(s) Eve= -0.140 VredHint: Carry at least 5 significant figures during intermediate calculations to avoid round off error when taking the antilogarithm.Equilibrium constant at 298 K:AGº for this reaction would be [than zero.

To solve this problem, we need to determine the overall standard cell potential (E°cell) for the…

Answered: 2H+ (aq) + Sn(s) → H₂ (9) + Sn²+ (aq)…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem 143QRT: The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry...

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The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry textbook estimates that if 1.00 × 108 tons Mg were taken out of the sea each year, it would take one million years for the Mg concentration to drop to 0.12%. Do sufficient calculations to either verify or refute this statement. Assume that Earth is a sphere with a diameter of 8000 mi, 67% of which is covered by oceans to a depth of 1 mi, and that no Mg is washed back into the oceans at any time.
Which of these statements are qualitative? Which are quantitative? Explain your choice in each case. (a) Sodium is a silvery-white metal. (b) Aluminum melts at 660 C. (c) Carbon makes up about 23% of the human body by mass. (d) Pure carbon occurs in different forms: graphite, diamond, and fullerenes.
A soft drink contains an unknown mass of citric acid, C3H5O(COOH)3. It requires 6.42 mL of 9.580 × 10−2-M NaOH to neutralize the citric acid in 10.0 mL of the soft drink. C3H5O(COOH)3(aq) + 3 NaOH(aq) → Na3C3H5O(COO)3(aq) + 3 H2O(ℓ) Determine which step in these calculations for the mass of citric acid in 1 mL soft drink is incorrect? Why? n (NaOH) = (6.42 mL)(1L/1000 mL)(9.580 × 10−2 mol/L) n (citric acid) = (6.15 × 10−4 mol NaOH) × (3 mol citric acid/1 mol NaOH) m (citric acid in sample) = (1.85 × 10−3 mol citric acid) × (192.12 g/mol citric acid) m (citric acid in 1 mL soft drink) = (0.354 g citric acid)/(10 mL soft drink) Determine the correct result.
3. What volume of 0.250 M KMnO4(aq) contains 0.500 g KMnO4? 0.791 Ml 2.00 mL 127 mL 125 mL
Use the meaning of the prefix "nano-" to select the value of "x" in this equation: 1 m = 1 x 10x nm . The value of " x " is (a) +9 (b) -6 (c) +6 (d) -9
Whilst working in the pharmacy aseptic unit you are asked to prepare 5 litres of a solution containing potassium ions 1 mmol/mL. What weight of potassium chloride is required? (atomic weight of potassium = 39: atomic weight of chlorine = 35.5)
The following ratios of NaOH to HCl were determined in an analysis: T1 = 0.9958, T2 = 0.9929. How much is the precision?
The legal limit for chromium in drinking water is 0.10 ppm. What is the maximum permissible mass of chromium (in \mu gμg) in exactly 1.0 cup (8.0 fl. oz.) of drinking water? Assume the density of drinking water is 1.00 g/mL. (1 fl. oz. = 29.57 mL)(Express your answer with two significant digits.)
A teacher developed a new chemical - NONDISTRACTUS, which allows students to focus in the classroom more and not be distracted by random events. For NONDISTRACTUS to be effective there must be a minimum concentration in the student's body of 2.00 x10-3 mol / L. If the concentration falls below this level, the students are faced with a 10 min nonproductive period where they cannot focus on anything. NONDISTRACTUS was found to undergo a very rapid first-order decay with a half-life (t½) in the bodies of students of 23 min. Based on this information:a) What is the rate law constant, k?b) If the student starts off with an initial concentration of 2.25 x 10-2 mol / L dose, how long will it be until the concentration is above the minimum 2.00 x 10-3 mol / L? Will it ensure that they are not distracted for the entire test?
CHEMISTRY (Please write the complete solution legibly. No long explanation needed. Answer in 2 decimal places. Box the final answer.) Hydrofluoric acid, HF (aq), cannot be stored in glass bottles because silicates in the glass areattacked by HF by the following reaction: Na2SiO3 (s) + 8HF (aq) → H2SiF6 (aq) + 2NaF (aq) + 3H2O (l) How many moles of Na2SiO3 will react with 1.50 moles of HF?
A chemist prepares a solution of silver(I) nitrate AgNO3 by measuring out ×6.4102μmol of silver(I) nitrate into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's silver(I) nitrate solution. Round your answer to 2 significant digits.
1597 59 S ||| 2 O CHEMICAL REACTIONS Calculating ion molarity using solute mass A chemist prepares a solution of magnesium bromide (MgBr₂) by measuring out 2.1 g of MgBr, into a 300. mL volumetric flask and filling to the mark with distilled water. V Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits. Microsoft O W Microsoft Microsoft 6.52.210... esc mol L Explanation 18 ! 1 Check 9,206 2 # 3 103 NOV 6 X $ 4 O 67 5⁰ % 5 stv 6 Y 2 & 7 © 2022 McGraw Hill LLC. All Rights Reserved. U * CO 66 8 A 9 I 1 Terms of Use | Privacy Center | Accessibility W 0 0 P { [ do F }

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